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this post was submitted on 17 Aug 2023
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Just a being pedantic and a stickler for detail. I'd expect modern tracking to use trilateration/multilateration.
It can be done in real-time and really needs 3 towers that have accurate time (GSM towers to my knowledge do use GPS derived accurate time). For this rather than direction/signal strength it uses the minute difference in arrival time for a signal between towers and works like an inverse GPS to calculate position.